Tail-stock for wood-turning lathes.



A. V. SMITH.

. TAIL STOCK FOR WOOD TURNING LATHES.

APPLICATION FILED s312110, 1909.

966,253. Y Patented Aug. 2, 1910.

'3' @y c' 02 Ifff ALBERT VICTOR SMITH, O'F PORTLAND, OREGON.

TAIL-STOCK FOR WOOD-TURNING LATHES.

Specification of Letters Patent.

Application led September1 10, .1909.

Patented Aug. 2, 1910.

serial Na. 517',o1v.-

To all whom 'it may concern:

Be it known that I, ALBERT Vieron SMITH, a citizen of the United States,and a resident of Portland, in the county of Multnomah `and State ofOregon, .have invented a new and Improved Tail-Stock for Wood- TurningLathes, of which the following is a full, clear, and exact description.

The invention relates to lathes for turning heavy timber, and its objectis to provide a new and improved tail stock, arranged to allow the tail`stock spindle to turn with the timber, with a view to eliminate thefriction incident to timber turning on afiXed or a dead center, and toprevent setting the timber on .tire during the turning operation, thearrangement also permitting the holding of the spindle :against turningwhen turning the small work. For the purpose f mentioned, the tail stockspindle is mounted to turn in a sleeve having lengthwise adjustment inthe tail stock bearin A practical embodiment o the invention isrepresented in the accompanying drawings forming a part of thisspecification, in which similar characters of reference indicatecorresponding parts in both views.

Figure l is a longitudinal central section of the improved tail stock;and Fig. 2 is an enlarged transverse section of the same on the line 2-2of Fig. l.

The stand A of the tail stock is provided with a bearing B, in which isheld lengthwise adjustable a sleeve C, and in which is mounted to turn aspindle D, provided at its forward end with a center E, of any approvedconstruction, for engagement with the work. In the ends of the sleeve Care arranged ball bearings F, F, of which the ball bearing F engages anannular flange D', formed on the forward end of the spindle D, and theball bearing F engages a nut G screwing on the rear end of the spindleD, so that the latter turns with comparatively little friction in thesleeve C. The forward end of the bearing B is preferably split, as

- plainly indicated in dotted lines in Figs. l

and 2, and on the said bearing B at the opposite sides of the split areformed lugs B engaged by a clamping screw I-I, to clamp the spindle Cfirmly in position in the bearing B after the said sleeve C has beenaxially adjusted to the desired position in the bearing B.

In order to lock or hold the spindle D against turning, in case smallwork is to be turned, the following arrangement is made: In the top ofthe bearing B screws a set screw I, passing through alengthwise-extending slot C in the sleeve C, the inner end of the saidset screw I engaging a lengthwise-extending groove D2 formed in the'spindle D and adapted to register with a slot C', as plainly shown inFigs. l and 2. Normally the set screw I is screwed outward out ofengagement with the groove D2, so that `the spindle D is free to revolvein the sleeve C; but when it is desired to lock or hold the spindle Dagainst turning, then the set screw I is turned inward at the time thegroove D2 is in register with the slot C', so that the inner end of theset screw I engages the groove D2 and holds the spindle D from turning.

' The rear end of the sleeve C is provided with a thread C2, on whichscrews a wheel nut J, provided on its hub with an exterior annulargroove J engaged by an inwardlyextending flange K formed on a cap K,screwed or otherwise secured to the rear end of the bearing B. By thearrangement described the wheel nut J can be readily turned by theoperator, to move the sleeve C and with it the spindle D and the centerE in an axial direction, toward or from the head stock of the lathe, tobring the center E into the desired position relatively to the workturned at the time. It is understood that when the wheel nut J is turnedin one direction, the sleeve C, spindle D2, and center E are movedtoward the head stock of the lathe, and when the wheel nut J is turnedin the opposite direction the said parts are moved from the said headstock.

The tail stock shown and described is very simple and durable inconstruction and can be readily applied to wood-turning lathes as nowconstructed.

It will be seen that by'the arrangement described, the center E turnswith the work in case the latter is a heavy timber, and when light workis to be turned, the center E can be held against rotation the same asan ordinary wood-turning` lathe.

Having thus described my invention, I

the said sleeve and provided with a center and with alengthwise-extending groove adapted to register with the said slot, anda set screw screwing in the said bearing and passing through the saidsleeve slot into the said spindle groove.

2. A tail stock having a stand provided with a bearing, a sleeve held inthe said bearing and provlded with a lengthwise-extending slot, the saidsleeve having an exterior screw thread, a spindle mounted to turn in thesaid sleeve and provided with a center and with a lengthwise-extendinggroove adapted to register with the said slot, and a set screw screwingin the said bearing and passing through the said Sleeve slot into thesaid spindle groove.

3. A tail stock having a stand provided with a bearing, a sleeve held inthe said bearing and provided with a lengthwiseextending slot, a spindlemounted to turn in the said sleeve and provided with a center and with alengthwise-extending groove adapted to register with the said slot, aset screw screwing in the said bearing and passing through the saidsleeve slot into the said splndle groove, a wheel nut screwing on thesaid screw thread and having its hub provided with an annular groove,and a cap held on the said bearing and having a flange engaging the saidwheel hub groove.

4. A tail stock having a stand provided with a bearing, said bearingbeing split at its inner end and having a lug on each side of the split,a set screw engaging the lugs for the purpose specified, a sleeve in thebearing, a spindle in the sleeve, and means movable into and out ofengagement with the sleeve and spindle to prevent or permit of rotarymovement of said sleeve and spindle while permitting longitudinalmovement thereof.

5. A tail stock having a stand provided with a bearing, a sleeve held inthe bearing, a spindle journaled in the sleeve and provided with acenter, the sleeve having at its outer end a threaded portion, a wheelnut on the threaded portion, and having its hub provided with an annulargroove, and a cap held on the bearing and having a fiange engaging thegroove.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

ALBERT VICTOR SMITH.

Witnesses:

W. S. GREGORY, P. G. MCINIS.

